Single impurities in a Bose-Einstein condensate can make two polaron flavors
Quantum Gases
2013-04-30 v1 Quantum Physics
Abstract
Polarons, self-localized composite objects formed by the interaction of a single impurity particle with a host medium, are a paradigm of strong interaction many-body physics. We show that dilute gas Bose-Einstein condensates (BEC's) are the first medium known to self-localize the same impurity particles both in a Landau-Pekar polaron state akin to that of self-localized electrons in a dielectric lattice, and in a bubble state akin to that of electron bubbles in helium. We also show that the BEC-impurity system is fully characterized by just two dimensionless coupling constants, and that it can be adiabatically steered from the Landau-Pekar regime to the bubble regime in a smooth crossover trajectory.
Keywords
Cite
@article{arxiv.1304.7704,
title = {Single impurities in a Bose-Einstein condensate can make two polaron flavors},
author = {A. A. Blinova and M. G. Boshier and Eddy Timmermans},
journal= {arXiv preprint arXiv:1304.7704},
year = {2013}
}